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cos(π/n)cos(2π/n)cos(3π/n) ... cos(nπ/n) = ?
Author:
羅驥韡 (Pegasus Roe)
Topic:
Complex Numbers
GeoGebra
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兩組對邊相等的四邊形
兩位數加法
兩位數除以一位數（一）
三位數除以一位數（二）
球體建築師
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旋轉
任意四邊形１比３
畢氏定理
層層套疊的四邊形
平行四边形
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Geometry
Poisson Distribution
Tangent Line or Tangent
Limits
Differential Equation